Manufacture of yarn



Jan. 7, 1947 M. HAIN MANUFACTURE OF YARN Filed Aug. 8, 1945 v zzwtmox, 'KaZcoZm f/ain,

ATTQRNEY Patented Jan. 7'; 1947 UNITEDQSTATES PATENT- OFFICE l 2,413,9ef MANUFACTURE OF YARN Malcolm Hain,Mon tclair,1 N. J.

Application August 8, 1945, Serial No. 609,531, j

. 4 Claims. (01. 19- 130,)

imparting tractive effort to a sliver (of jute or other fibers) including supporting structure, a pair of drawing rolls and a pair of retaining rolls journaled in said structure, a driven roll also journaled in said structure substantiallybetween the said roll pairs, and meansto rotate one drawing roll and one retaining roll, the former at the superior speed, and also rotate the drivenrollxat a speed between those of the latter drawing and retaining rolls, of novel means coactive with said driven roll to control the draft of the sliver being drawn, which latter means included a pair of freely rotative rolls yieldingly urged toward the driven roll and free to turn as a pair around an axis parallel with the driven roll.

According to the present invention the combination includes, with the said mechanism, means coactive with the driven roll to control the draft which is simpler in construction and permits the necessary manual operations to be performed more readily and with freer access to the sliver and to said control means.

In the drawing, L

Fig. 1 is a side elevation, partly in section, of

a part of the sliver-drawing machine constructed in accordance with this invention; Fig. 2 is a view of the pressure lever and the carrier for the pressure roll as seen approximately in the direction of the arrow in Fig. 1;

Fig. 3 is a side elevation, partly in section, of a modified form of so much of the machine as includes the pressure lever, pressure roll and-*carrier, together with the retaining rolls and the driven roll; and

Fig. 4 is a plan of the carrier and a fragment .of the lever of .Fig. 3.

The machine frame is partly -shown'at I. At

2-2a are the drawing rolls, roll 2 having its shaft 3 journaled in the frame and roll 2a having its trunnions resting on guideways, as la, of the frame and it being assumed to be held against roll 2 by any well known means (not shown). At 4--4a are the usual fluted retaining rolls, roll 4 having its shaft 5 journaled in the frame and roll 4a being journaled in a lever B fulcrumed in the frame and, being weighted at 1, holding such roll normally pressed against roll 4, the lever forming a part of what I term the supporting structure. M The sliver travels overa guide 8 and through a guide lid on the frame,

between the rolls 4-411, then through a spout 9 on the frame, then between the rolls 2-201 and finally down to the spinning unit (not shown).

r a 2 Besides the tractive effort exerted on the sliver by theabove roll pairs there is also that of a driven roll in which has its'shaft l I journaled in the frame, said roll being here directly betweenthe drawing roll and retaining roll pairs.

As for the control means: A pressure roll l2 bears against roll I0 at the inner or here left side of the latter. It' is journaled in a carrier I3 comprising (Fig; 2) two arms 13a fast to a shaft 14, wherefore the carrier is fork-shaped. The arms have bearing means [3b for the trunnions of the pressure roll, which means faces the driven roll I0. Their free ends are here bent upwardly 7 and over and thereby normally rest on the shaft ll of the driven roll. Such carrier, in part supported or confined against downward displacement here by shaft H, is also supported by a pressure lever l5 (here of the bell-crank type) which is fulcrumed at lBa in the arms of a bracket l6 of the supporting structure and in which the shaft ll of the carrier is rotative. 'I'o guide the sliver the carrier has a pair of arms l1. Lever I5 is normally urged in the direction to urge the carrier toward the driven roll by, here, a weight l5a.

The drawing rolls may be driven at a speed greater than that of the retaining rolls and the driven roll at a speed between those of such drawing and retaining rolls substantially as in my said patent, or by the following gearing: Shaft 3 being suitably driven, a gear 18 thereon meshes with a gear l9 formed as a unit with a gear. 20 which meshes with a gear 2! on shaft 5. Gear 2] is in effect a unit with a gear 22 which meshes with a gear 23, in turn meshing with a gear 24 on shaft ll of the driven roll.

The system comprising the bracket 25, handlever 26, bell-crank lever 28, link 2'! and link 29, with the latters abutment 29a for lifting lever 15, is substantially the same in construction and operation as the corresponding mechanism in my said patent. If the sliver should part below' the drawing rolls so that it is necessary to check its delivery, the operator by hand-lever 26 moves the parts 26-41-48-451 to the dotted position so that the sliver becomes clamped between the surface 260: of such hand-lever and surface a of the bracket and so is parted at or near the drawing rolls. The parting occurs at or in approximate coincidence with the nip of the drawing rolls because the surfaces of the carrier which form a guideway are forward of the bearing means I312 are sloped downwardly and forwardly, wherefore when the carrier is retracted at least the weight of the pressure roll continues to coact with 3 roll III to maintain some clamping pressure on the driven roll.

In the modification shown by Figs. 3 and 4 the carrier is supported in part by the pressure lever and in part directly by a portion of the supportingstructure of the machine. Thus, the pressure roll I2 is here journaled in a fork-shaped carrier 30 comprising two arms 30a and a shaft 3| to which they are fast, which arms at their free ends have bearing means 30b for the trunnions of the pressure roll. Shaft 3| is rotative in a lever 32 corresponding to lever l5 and fulcrumed at 32a in the upstanding arm 33a of a bracket 33 forming in effect a part of the supporting structure, the forward upturned edge 33b of the bracket coactlng with the lever in this case to support the carrier and hence maintain the roll l2 in the same operative relation to the driven roll as in the construction first described. At 34 are the arms on the carrier for guiding the sliver. At 30c are the sloping surfaces on the wcarrier to function the same as the surfaces l3c.-=' The operation in this case is generally the same as that already described.

Havin thus fully describedmy invention what I claim is:

1. In the art of drawing sliver, the combination, with mechanism forimparting tractive effort to the sliver including supporting structure, a pair of drawing rolls and a pair of retaining rolls journaled in said structure,,a driven roll also journaled in said structure substantially between said roll pairs, all said rolls being substantially parallel, and means to rotate one drawin roll and one retaining roll, the former at the superior speed; and also rotate the driven roll at a speed between those of the latter drawing and retain ing rolls, of means coactive with said driven roll to control the draft including a pressure roll substantially parallel with and normally urged to coact with the driven roll to "grip the sliver, a

' carrier in which the pressure roll is journaled and being in part supported by said mechanism and having lateral of the path of the sliver hearing means facing the driven roll and abutting the pressurev roll, and a lever to which the carrier is pivoted to oscillate therewith independently of the pressure roll and also supporting the carrier and normally urged in the direction to urge the carrier toward said driven roll, said carrier having a guideway for supportin the 

